| A | B |
|---|
| Aufbau Principle | Electrons will occupy the lowest shell they possibly can. |
| Electron Configuration | The arrangement of electrons with in the atoms electron clouds. |
| Highest Occupied Energy Level | The last electron cloud occupied with electrons. |
| Hund’s Rule | All orbits are filled equally with electrons in one direction before the other direction will begin to fill. |
| Inner-shell Electrons | Electrons not in the last electron cloud. |
| Noble Gasses | Group 18 elements that have an outer most shell filled. |
| Orbital Quantum Number | Indicates the shape of the orbital. |
| Pauil Exclusion Principle | No two electrons can have same four quantum numbers. |
| Principal Quantum Number | Symbolizes the main energy level, represented by n. |
| Quantum Numbers | Numbers that tell the specific atomic orbital of electrons. |
| Spin Quantum Number | States the positive or negative spin value (- ½ or + ½). |
